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Ideal Proof Testing Design
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Starts with the SRS - what is the safety function supposed to do?
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FAT and SAT should deliver basis of proof test
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On commissioning, have the instrument technicians write the proof test
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Have the instrument engineer verify it
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Or vice-versa, but peer review it as much as you can
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Carry out Human Factors Analysis
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Lots of pictures in the work instruction!
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Don’t forget competence
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